Fatal error upon switching language dashboard with WPML

Fatal error: Uncaught Error: Call to a member function using_permalinks() on null in D:\website.com\wp-content\plugins\html-on-pages\html-on-pages.php:25 Stack trace:

#0 D:\website.com\wp-includes\class-wp-hook.php(324): no_page_slash(‘/en’, ”)

#1 D:\website.com\wp-includes\plugin.php(205): WP_Hook->apply_filters(‘/en’, Array)

#2 D:\website.com\wp-content\plugins\sitepress-multilingual-cms\classes\utilities\class-wpml-slash-management.php(82): apply_filters(‘user_trailingsl…’, ‘/en’, ”)

#3 D:\website.com\wp-content\plugins\sitepress-multilingual-cms\classes\utilities\class-wpml-slash-management.php(52): WPML_Slash_Management->user_trailingslashit(‘/en’)

#4 D:\website.com\wp-content\plugins\sitepress-multilingual-cms\classes\url-handling\converter\strategy\class-wpml-url-converter-subdir-strategy.php(120): WPML_Slash_Management->maybe_user_trailingslashit(‘https://www.web…’)

#5 D:\website.com\wp-content\plugins\sitepress-multilingual-cms\classes\url-handling\converter\ in D:\website.com\wp-content\plugins\html-on-pages\html-on-pages.php on line 25